BF1 - GOST Rus

Diagram n (λ)

n calculation

Analogue search

Main parameters
n_d = 1.524782 n_e = 1.527058	V_d = 54.96 V_e = 54.68	n_F - n_C = 0.009548 n_F' - n_C' = 0.009638

Type: Resnik
Spectral range: 0.36501 - 2.6 mkm.
C1 = 0.028 C2 = 1.52104 C3 = 0.0175805 C4 = -0.0106639 C5 = -0.0008578 C6 = 0.000121685 C7 = 0.000163075 C8 = -0.000219961 C9 = 0.000397004 C10 = -0.00016656 C11 = -0.00037649

Refraction index
n _2.3254	1.497008
n _1.9701	1.502204
n _1.5296	1.507801
n _1.06	1.513556
n _t	1.514198
n _s	1.516841
n _r	1.520262
n _C	1.521895
n _C'	1.522353
n _0.6328	1.522782
n _D	1.524697
n _d	1.524782
n _e	1.527058
n _F	1.531443
n _F'	1.531991
n _g	1.536697
n _h	1.541119
n _i	1.548784
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8060
P_C,A'	0.3422
P_d,C	0.3023
P_e,C	0.5406
P_g,d	1.2478
P_g,F	0.5502
P_h,g	0.4631
P_i,g	1.2658
P_C',t	0.8540
P_e,C'	0.4927
P_F',e	0.5167
P_i,F'	1.7586

Density: 2.67 g/cm³
Poisson coef.: 0.203
Rigidity: 283.9 Pa*10⁸
Young module: 697 Pa*10⁸
Optical stress coef.: 3.16 1/Pa*10¹²
Abrasion: 1

Climatic resistance: Б
Resistance to acids: I

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-60 ~ 20	67
0 ~ 30	69
20 ~ 120	73
20 ~ 300	79

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-60 ~ 20	F	2
-60 ~ 20	e	1.7
-60 ~ 20	D	1.5
-60 ~ 20	C	1.4
20 ~ 120	F	3.8
20 ~ 120	e	3.4
20 ~ 120	D	3.2
20 ~ 120	C	3.1